Problem: pre-flight check does not understand the plugin "upgrade" bo…

…olean

Solution: Call `pip-compile -P pulp-file -P pip-compile` for example,
where each named plugin has `upgrade: true`.
The requirements.in will continue to list all plugins, and their
specified versions (if any.)

fixes: #6643
pre-flight check does not understand the plugin "upgrade" boolean
https://pulp.plan.io/issues/6643

re: https://pulp.plan.io/issues/6623
pulpcore and plugin pre-flight check seems to not be enforcing and then installer fails at collectstatic

CHANGES/6643.bugfix

@@ -0,0 +1 @@
+Fixed the pulpcore/plugin compatibility check accidentally enforcing on upgrades when plugins have their upgrade variable specified, and the latest version of the plugin actually is compatible.

roles/pulp/tasks/install.yml

@@ -197,7 +197,10 @@
           changed_when: false
 
         - name: Run pip-compile to check pulpcore/plugin compatibility
-          command: '{{ pulp_install_dir }}/bin/pip-compile'
+          command: '{{ pulp_install_dir }}/bin/pip-compile
+{% for plugin, value in pulp_install_plugins.items() %}
+{% if value["upgrade"]|default(false, true) %} -P {{ plugin }} {% endif %}
+{% endfor %}'
           args:
             chdir: '{{ pulp_install_dir }}'
           register: compatibility